Panasonic KX-TG2521CAT / KX-TGA251RUT Service Manual ▷ View online
61
KX-TG2521CAT/KX-TGA251RUT
Memo
62
KX-TG2521CAT/KX-TGA251RUT
13.2. Schematic Diagram (Base Unit)
IC801
*IC421
(1)
(2)
(2)
(3)
(4)
(4)
(5)
(7)
(6)
(8)
(9)
NC: No Components
3.0V
2.5V
Beep
Bell Signal
Bell Signal
TX _RF
TX _RF
RX _RF
GND
SPm
SPp
GND
GND
GND
GND
+3.0V
100
R75
*R425
270k
UTX
URX
GND
ANT_1
ANT2
NC
C854
ANT1
GND
GND
ANT_2
GND
NC
C850
GND
GND
1k
R76
ANT1_TP
ANT2_TP
GND
GND
GND
1u
C616
GND
+3.0V
GND
AP1
*CN5
PARALLEL WIRE
.
GND
GND
+2.5_CP
1u
C625
CL1
CL2
GND
GND
100n
C808
GND
GND
GND
PON
1k
R804
RF_RXp
RF_RXn
GND
GND
GND
TXp
GND
220
R806
GND
TXn
GND
PSEL
3.3n
C814
VDD_PADRV
TXON
1k
R803
GND
1
PSET
2
VCCS
3
PI
4
PIX
7
PSEL
8
POX
9
PO
10
VCC
11
GND
5
PRAMP
6
PAON
GND
GND
GND
RXON
220
R807
GND
47
R805
GND
*C421
10n
GND
*R424
10k
GND
*Q421
VDD5
GND
*C422
100n
*R426
560
560
560
*R427
*R428
*R429
3.3k
GND
R135
10k
GND
10
R430
GND
GND
100p
C856
100p
C858
GND
GND
10
100n
C60
CKM
GND_C
Q24
GND
+1.8V
NC
C837
CN5-10
CN5-9
CN5-8
CN5-7
CN5-6
CN5-5
CN5-4
CN5-3
CN5-2
CN5-1
1.5p
C803
27n
L801
DA802
1
2
3
DA801
1
2
3
1.8p
C804
1.8p
C802
Shield
12
3
4
5
6
3n
L802
3n
L803
3.3p
C805
3.3p
C806
VDD4
C163
NC
GND
GND
JTAG
3p
C860
GND
GND
*R86 NC
*R87 NC
220
RA80
1
2
3
4
4
*C149
NC
*C150
NC
100p
C823
GND
*C501
1n
*SW1
1
2
R808
NC
URX2
UTX2
GND2
GND
1
*CE
2
SO
3
*WP
4
VSS
5
SI
6
SCK
7
*HOLD
8
VDD
GND
NC
C423
NC
*RA501
1
2
3
4
5
6
7
8
6
7
8
NC
*R516
0
*R511
C851
7p
C853
7p
GND
Q25
R801
22k
1.5k
R133
10p
C811
10p
C855
10p
C809
10p
C819
10p
C812
10p
C827
10p
C825
10p
C857
*C516
NC
*C515
NC
*C513
NC
*C514
NC
*C511
NC
*C512
NC
C517
NC
C519
NC
C518
NC
NC
C520
10p
C631
*C146
NC
C859
10p
NC
C521
NC
C861
NC
C522
10p
C630
*C145
NC
2.2p
C810
2.2p
C813
*R132 680
120
*R802
1p
*C834
1.1p
*C826
NC
L804
GND
NC
C862
0.5p
C820
3p
C822
SDA2
SCL2
TAM_CSn
SPI_CLK
TAM_WP
KEY0
KEY1
ROW1
ROW2
KEY2
CHARGE
TAM_WP
SPI_DI
SPI_DO
SPI_DO
TAM_CSn
SPI_DI
SPI_CLK
Low_Rad
ROW0
ROW0
ROW0
TAM_WP
ROW2
KEY0
KEY1
ROW1
KEY2
LED1
LED2
eco_mode
for TG6511/2511/2521
TG7511/8511/5511
CP_OUT1=3.0V
Pow_Adj
Pre-matching
Balun
BPF
W 0.15mm
L 22+/-4mm
1st or 4th layer
W 0.15mm
L 22+/-4mm
1st or 4th layer
W 0.15mm
L 22+/-4mm
1st or 4th layer
W 0.15mm
L 5.0mm
1st layer
W 0.15mm
L 5.0mm
1st layer
W 0.15mm
L 20+/-2mm
3rd layer
W 0.15mm
L 20+/-2mm
3rd layer
W 0.15mm
L 20+/-1mm
3rd layer
W 0.125mm
L 7.6mm
Gap 0.125mm
1st layer
W 0.15mm
L 4.0mm x2
1st layer
63
KX-TG2521CAT/KX-TGA251RUT
*IC401
GND
GND
Q8
1u
C614
GND
+1.8V
GND
GND
GND
GND
56k F
R615
GND
GND
GND
SA1
33u
L1
33u
L2
GND
J101
GND
GND
+6.5V
GND
GND
GND
10k
R16
GND
GND
GND
GND
NC
(3216)
R123
100k
R14
D3
4
1
3
2
GND GND
GND
*C16
NC
27k
R18
GND
NC
C17
GND
0.033
*C28
100k
R27
NC
C15
GND
TP10
0
R116
8.2k
R19
100k
R23
+1.8V
GND
GND
GND
GND
GND
NC
C24
C57
NC
GND
GND
12
R21
GND
TP9
NC
C23
470k
R28
K0.1u
C56
NC
C141
GND
GND
1u
C22
NC
C155
1k
R33
1k
R35
GND
GND
10p
C136
GND
100k
R10
GND
+1.8V
GND
GND
100k
R8
100n
C72
100n
C61
GND
3.3k
R81
3.3k
R117
+1.8V
1n
C157
TP16
TP15
*C48
NC
*C156
NC
GND
GND
GND
GND
GND
100n
C51
GND
GND
GND
100n
C75
Q4
*D23
NC
+3.0V
2.2u
C84
NC
NC
NC
C306
1u
C305
GND
GND
1k
R130
10k
R129
3A
F1
10k
RA402
1
2
3
4
*D5
NC
A
K
D6
NC
AK
D9
NC
AK
1u
C615
Q9
+2.4V
+2.4V
GND
220
R106
220
R109
10k
R77
NC
R78
GND
NC
C167
VDD2
100n
C7
100n
C8
10p
C65
+2.5_CP
L2T
L1T
L1R
DCM
DCP
L2R
10p
C137
GND
100u
16
C32
50
10u
C27
GND
10.368M
X1
1
3
2
0
R29
ANT1
RF_RXn
RXON
TXON
TXn
TXp
VDD_PADRV
PSEL
PON
ANT2
RF_RXp
GND
10
330u
C36
10k
R657
GND
GND
GND
GND
Q5
680p
C9
500
680p
C10
500
1k
RA1
1
2
3
45
6
7
8
C622
NC
NC
*D22
LINE_DC
*R126
NC
HAK_CL1
STM
VDD1
NC
C1
C617
1u
10
NC
C29
NC
C30
C37
NC
1M
R4
1M
R6
180k
R3
180k
R5
GND
*Q22
*R7
NC
*R9
NC
27
R22
*C25
0.047u
1u
C86
22uH
L3
GND
47
R91
DC_IN
0.1u
C87
0.01u
C88
120
R92
VDD3
NC
*D24
*Q23
Q10
D10
NC
C90
D27
NC
680
R95
4.7k
R93
1 ON/*OFF
2
VSS
4
EXT
5
VIN
3 VOUT
*C626
NC
NC
*C637
3.9k
R37
0.1u
*C624
1u
*C623
270
R40
10p
C169
10p
C170
*C147
NC
*C148 NC
10p
C168
10p
C74
NC
C70
10p
C171
*C49
NC
2.7k
0.25W
R15
*D15
NC
AK
*D16
NC
A
K
*R2
NC
NC
*C2
*Q3
*Q2
(3216)
*R124
10
*R12
10k
*R13 680
*C12
NC
2.2k
*R17
NC
*C166
47k
*R24
*D26
NC
1
VSS_LNA1
2
RF_RXp
21
CIDINp/VREFp
3
RF_RXn
4
VSS_LNA2
5
RFP1
6
RFP0
7
REF_RES
8
AVS_XTAL
22
RINGp/P3_7
23
RINGn/P3_6
24
RINGOUT/RINGING/P3_5
25
PARADET/P3_4
26
ADC0/P3_3
27
ADC1/INT0/P1_0
28
NTC/ADC2
41
CP_C2y
42
CP_VOUT1/LED1
43
CP_VOUT2/LED2
44
PON/P1_6
45
VDD1
46
P2_7/BXTAL
81
GND
9
XTAL2
10
XTAL1
11
AVD_XTAL
12
RF_SUPPLY1
13
LDO_CTRL
14
AVD
15
LSRn
16
LSRp
17
VREFm
18
MICh
19
CIDOUT/MICn
20
CIDINn/MICp
29
SOCp
30
SOCn
31
CHARGE_CTRL
32
P1_7/CHARGE
33
PAOUTp/P3_1
34
VDDPA
35
PAOUTn/P3_0
36
VBAT1
37
CP_C1x
38
CP_C2x
39
CP_C1y
40
VBAT2
47
P1_5/INT5/RDI/VDDE
48
P1_4/INT4/TDOD
49
P1_3/INT3/SIO
50
P1_2/INT2/SK
51
P1_1/INT1/LE
52
P2_6/WTF_IN
53
P0_7/SPI_DI
54
P0_6/SPI_DO
55
P0_5/SPI_CLK
56
P0_4/SPI_EN
57
P0_3/SCL2
58
P0_2/SDA2
59
P0_1/URX
60
P0_0/UTX
61
RSTn
62
JTAG
63
P2_5/PCM_FSC/SF
64
P2_4/SCL1/PCM_DO/DP3
65
P2_3/SDA1/PCM_DI/DP2
66
P2_2/PCM_CLK/CLK100
67
P2_1/ECZ2/PWM1/LED4
68
P2_0/ECZ1/PWM0/LED3
69
VDD2
70
LDORF_CTRL
71
RF_SUPPLY2
72
RFP0n
73
RFP4
76
VSS_PADR1
79
VSS_PADR2
77
RF_TXp
80
RFP2
75
VDD_PADR
78
RF_TXn
74
RFP3
4.7M
*R43
5.6
(6332)
*R55
5.6
(6332)
*R56
0
*R57
*R30
470
*R31
470
*R20
2.7k
1200p
*C19
33n
*C54
*C55
82n
120k
*R36
820p
*C52
820p
*C53
82k
*R32
82k
*R34
680p
*C3
680p
*C4
*C5
10n
10n
*C6
4.7M
*R42
*C14
0.027u
*D21
10n
*C42
10n
*C43
NC
C18
1
A0
2
A1
3
A2
4
GND
5
SDA
6
SCL
7
WP
8
VCC
EEP_WP
Low_Rad
LED2
LED1
EEP_WP
CHARGE
eco_mode
SCL2
SDA2
DC_IN
Charge -
Charge +
TO RF BLOCK
TG65/85xx only
3V DCDC convertor
Charge -
Charge +
1.8V
3.0V
TX _RF
RX _RF
TX _AF
B
ell signal
C
aller I D
0.75V
0V
250
mVp-p
L
oop Current
C
harge
C
urrent
RX_AF
B
ell signal
*IC401
IC2
IC3
*IC7
KX-TG2521
CA SCHEMATIC DIAGRAM (Base Unit)
NC: No Components
(1)
(2)
(3)
(4)
(5)
(7)
(6)
(8)
(9)
64
KX-TG2521CAT/KX-TGA251RUT
13.3. Schematic Diagram (Handset)
BATT+
BATT-
0.1
R45
BATTERY
+1.8V
GND
1k
R66
C45
K0.1u
C121
NC
+1.8V
GND
1u
C47
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
C44
K0.1u
GND
1.2k
R7
100
R8
CP+4.0V
+1.8V
k0.1u
C40
RF_RXp
PON
PSEL
VDD_PADRV
TXp
TXn
TXn
TXON
RXON
RF_RXn
CP+3.0V
0
R215
Q7
Q2
Q4
BATTERY
1u
C50
1u
C49
CP+4.0V
SOFT_C
12
SOFT_B
12
SOFT_A
12
SHARP
12
AST
12
GND
8
12
TALK
1
2
4
12
7
12
3
12
9
12
1
12
6
12
2
12
0
12
5
12
S1
1
2
100
R63
F56k
R203
10k
R64
BATTERY
GND
NC
R2
C43
10p
C46
10p
NC
C39
GND
CP+3.0V
Q9
10
R20
NC
R6
*LED3
*LED2
*LED1
*LED12
D1
1M
R330
1u
C332
Q11
Q12
GND
GND
27k
R332
BATTERY
27k
R331
GND
GND
1k
RA1
1
2
3
45
6
7
8
GND
K10u
C53
K10u
C52
D10p
C54
GND
D10p
C55
K1u
C51
820
R27
K10u
C12
C17
D10p
K0.1u
C11
K0.1u
C13
3.3k
RA4
VREFm
C18
D10p
D10p
D10p
C96
820
R28
D10p
C97
VREFm
NC
C48
GND
0
R225
K2.2u
C10
6.3V
330u
CP2
C2
GND
RE2
RF-SHIELD
12
3
4
5
6
GND
UTX
URX
GND
URX
GND
JTAG
BAT
CP4.0V
CP3.0V
POWER
CKM
1.8V
CHG(+)
CHG(-)
STM
NC
C3
NC
C150
220
RA61
1
2
3
4
6.3V
330u
C1CP1
1u
C331
C182
3p
*R248
0
GND
NC
R4
GND
NC
R400
GND
GND
NC
C400
NC
D400
NC
R405
Q400
NC
GND
Q401
NC
+1.8V
NC
R401
NC
R404
NC
R402
NC
R403
NC
R406
NC
R407
LEFT
1
2
DOWN
12
RIGHT
12
UP
12
R
1
2
SP
12
L47
L46
NC
*RA30
1
2
3
45
6
7
8
1.5k
R30
1k
R3
*LED22
NC
*LED23
NC
NC
NC
1k
R23
100
R31
C147
NC
150
*RA32
1
2
3
4
5
6
7
8
Power_adj
NC
*RA31
1
2
3
4
K1u
C5
D7
NC
C340
J39p
C341
NC
C342
GND
GND
GND
NC
C38
NC
*C138
NC
*C139
*LED5
*LED7
*LED4
*LED6
*LED8
*LED9
*X1
10.368M
1
3
2
*LED21
NC
NC
NC
NC
NC
NC
*R249
1
VSS_LNA1
2
RF_RXp
21
CIDINp/VREFp
3
RF_RXn
4
VSS_LNA2
5
RFP1
6
RFP0
7
REF_RES
8
AVS_XTAL
22
RINGp/P3_7
23
RINGn/P3_6
24
RINGOUT/RINGING/P3_5
25
PARADET/P3_4
26
ADC0/P3_3
27
ADC1/INT0/P1_0
28
NTC/ADC2
41
CP_C2y
42
CP_VOUT1/LED1
43
CP_VOUT2/LED2
44
PON/P1_6
45
VDD1
46
P2_7/BXTAL
81
GND
9
XTAL2
10
XTAL1
11
AVD_XTAL
12
RF_SUPPLY1
13
LDO_CTRL
14
AVD
15
LSRn
16
LSRp
17
VREFm
18
MICh
19
CIDOUT/MICn
20
CIDINn/MICp
29
SOCp
30
SOCn
31
CHARGE_CTRL
32
P1_7/CHARGE
33
PAOUTp/P3_1
34
VDDPA
35
PAOUTn/P3_0
36
VBAT1
37
CP_C1x
38
CP_C2x
39
CP_C1y
40
VBAT2
47
P1_5/INT5/RDI/VDDE
48
P1_4/INT4/TDOD
49
P1_3/INT3/SIO
50
P1_2/INT2/SK
51
P1_1/INT1/LE
52
P2_6/WTF_IN
53
P0_7/SPI_DI
54
P0_6/SPI_DO
55
P0_5/SPI_CLK
56
P0_4/SPI_EN
57
P0_3/SCL2
58
P0_2/SDA2
59
P0_1/URX
60
P0_0/UTX
61
RSTn
62
JTAG
63
P2_5/PCM_FSC/SF
64
P2_4/SCL1/PCM_DO/DP3
65
P2_3/SDA1/PCM_DI/DP2
66
P2_2/PCM_CLK/CLK100
67
P2_1/ECZ2/PWM1/LED4
68
P2_0/ECZ1/PWM0/LED3
69
VDD2
70
LDORF_CTRL
71
RF_SUPPLY2
72
RFP0n
73
RFP4
76
VSS_PADR1
79
VSS_PADR2
77
RF_TXp
80
RFP2
75
VDD_PADR
78
RF_TXn
74
RFP3
F1
5.6n
J56p
C35
LDO_CTRL
COL0
CHARGE_CTRL
CHARGE
UTX
COL0
COL1
COL2
COL3
COL4
COL1
COL2
COL3
COL4
ROW3
ROW2
ROW1
CHARGE
CHARGE_CTRL
COL4
KEY_LED
BELL_LED_A
URX
LDO_CTRL
LCD_RESET
LCD_CD
LCD_SCL
LCD_SDA
JTAG
SOCp
LCD_CSB
ROW0
SOCn
BELL_LED_A
COL5
COL1
COL2
COL5
ROW0
COL3
ROW1
ROW3
ROW2
SOCp
SOCn
KEY_LED
CHARGE
Terminal
BATTERY
BELL LED
(Amber)
(Amber)
TO RF BLOCK
[RU]
[EX /FX]
To PA
(MAX500mA)
KEY B/L
LCD B/L
*IC1
(1)
(2)
(3)
(2)
(3)
(4)
(6)
(5)
(8)
(9)
(10)
(10)
(11)
(12)
(13)
(14)
(15)
(7)
C
harge Current
3.0V
4.0V
1.8V
0.75V
0V
250
mVp-p
TX _RF
RX _RF
NC: No Components
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